======================================
| [   39.174035][  T367] 1 lock held by ip/367:
| [ 39.174164][ T367] #0: ffffffffb31d2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   39.174473][  T367]
| [   39.174473][  T367] stack backtrace:
[   39.174904][  T367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   39.175243][  T367] Call Trace:
[   39.175367][  T367]  <TASK>
[ 39.175453][ T367] dump_stack_lvl (lib/dump_stack.c:122) 
[ 39.175614][ T367] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 39.175769][ T367] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 39.175928][ T367] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 39.176122][ T367] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 39.176278][ T367] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 39.176486][ T367] br_add_if (net/bridge/br_if.c:692) 
[ 39.176609][ T367] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 39.176762][ T367] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 39.177001][ T367] do_setlink (net/core/rtnetlink.c:2907) 
[ 39.177173][ T367] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 39.177347][ T367] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 39.177517][ T367] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 39.177683][ T367] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 39.177855][ T367] ? __kernel_text_address (kernel/extable.c:79) 
[ 39.178022][ T367] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 39.178207][ T367] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 39.178426][ T367] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 39.178611][ T367] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 39.178783][ T367] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 39.178950][ T367] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 39.179118][ T367] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 39.179255][ T367] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 39.179432][ T367] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 39.179607][ T367] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 39.179793][ T367] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 39.179965][ T367] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 39.180143][ T367] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 39.180362][ T367] ? __create_object (mm/kmemleak.c:751) 
[ 39.180533][ T367] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 39.180713][ T367] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 39.180832][ T367] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 39.180992][ T367] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 39.181151][ T367] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 39.181305][ T367] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 39.181427][ T367] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 39.181584][ T367] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 39.181738][ T367] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 39.181893][ T367] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 39.182068][ T367] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 39.182230][ T367] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 39.182386][ T367] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 39.182546][ T367] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 39.182699][ T367] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 39.182859][ T367] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 39.183019][ T367] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 39.183172][ T367] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 39.183361][ T367] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 39.183537][ T367] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 39.183713][ T367] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 39.183893][ T367] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 39.184100][ T367] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 39.184280][ T367] ___sys_sendmsg (net/socket.c:2653) 
[ 39.184452][ T367] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 39.184624][ T367] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 39.184799][ T367] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 39.184970][ T367] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 39.185183][ T367] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 39.185353][ T367] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 39.185527][ T367] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 39.185737][ T367] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 39.185916][ T367] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 39.186085][ T367] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 39.186255][ T367] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2034 arch/x86/mm/physaddr.c:65) 
[ 39.186445][ T367] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 39.186617][ T367] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   39.186827][  T367] RIP: 0033:0x7f7ff76e77b7
[ 39.187009][ T367] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   39.187607][  T367] RSP: 002b:00007fff5184fa48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   39.187859][  T367] RAX: ffffffffffffffda RBX: 00007fff51850180 RCX: 00007f7ff76e77b7
[   39.188111][  T367] RDX: 0000000000000000 RSI: 00007fff5184fab0 RDI: 0000000000000005
[   39.188357][  T367] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   39.188601][  T367] R10: 0000000021559910 R11: 0000000000000246 R12: 0000000000000003
[   39.188861][  T367] R13: 0000000066be9fd3 R14: 0000000000496600 R15: 0000000000000000
| [   39.190870][  T367] 1 lock held by ip/367:
| [ 39.190992][ T367] #0: ffffffffb31d2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   39.191283][  T367]
| [   39.191283][  T367] stack backtrace:
[   39.191711][  T367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   39.192047][  T367] Call Trace:
[   39.192166][  T367]  <TASK>
[ 39.192251][ T367] dump_stack_lvl (lib/dump_stack.c:122) 
[ 39.192411][ T367] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 39.192575][ T367] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 39.192770][ T367] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 39.192925][ T367] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 39.193125][ T367] br_add_if (net/bridge/br_if.c:692) 
[ 39.193248][ T367] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 39.193403][ T367] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 39.193601][ T367] do_setlink (net/core/rtnetlink.c:2907) 
[ 39.193756][ T367] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 39.193934][ T367] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 39.194087][ T367] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 39.194240][ T367] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 39.194398][ T367] ? __kernel_text_address (kernel/extable.c:79) 
[ 39.194550][ T367] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 39.194703][ T367] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 39.194893][ T367] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 39.195238][ T367] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 39.195391][ T367] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 39.195543][ T367] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 39.195695][ T367] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 39.195907][ T367] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 39.196072][ T367] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 39.196246][ T367] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 39.196429][ T367] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 39.196601][ T367] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 39.196871][ T367] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 39.197079][ T367] ? __create_object (mm/kmemleak.c:751) 
[ 39.197233][ T367] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 39.197392][ T367] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 39.197612][ T367] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 39.197767][ T367] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 39.198581][ T367] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 39.198745][ T367] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 39.198888][ T367] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 39.199060][ T367] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 39.199231][ T367] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 39.199403][ T367] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 39.199589][ T367] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 39.199761][ T367] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 39.199930][ T367] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 39.200100][ T367] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 39.200276][ T367] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 39.200544][ T367] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 39.200750][ T367] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 39.200933][ T367] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 39.201106][ T367] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 39.201289][ T367] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 39.201462][ T367] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 39.201632][ T367] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 39.201844][ T367] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 39.202113][ T367] ___sys_sendmsg (net/socket.c:2653) 
[ 39.202284][ T367] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 39.202455][ T367] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 39.202627][ T367] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 39.202881][ T367] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 39.203091][ T367] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 39.203262][ T367] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 39.203440][ T367] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 39.203735][ T367] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 39.203929][ T367] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 39.204147][ T367] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 39.204311][ T367] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2034 arch/x86/mm/physaddr.c:65) 
[ 39.204591][ T367] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 39.204767][ T367] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   39.204994][  T367] RIP: 0033:0x7f7ff76e77b7
[ 39.205180][ T367] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   39.205775][  T367] RSP: 002b:00007fff5184fa48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   39.206026][  T367] RAX: ffffffffffffffda RBX: 00007fff51850180 RCX: 00007f7ff76e77b7
[   39.206369][  T367] RDX: 0000000000000000 RSI: 00007fff5184fab0 RDI: 0000000000000005
[   39.206620][  T367] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   39.206964][  T367] R10: 0000000021559910 R11: 0000000000000246 R12: 0000000000000003


Finger prints:
lockdep_rcu_suspicious:br_get_link_af_size_filtered:br_info_notify:br_add_if:do_setlink